Bad sequence diagram rendering

[canercandan]

When I try to generate a scruffy-ed sequence diagram (I used the sample available on the README), I get a weird result with some texts failing to show, here is the command line and the resulting image:

suml -i test.suml --png --sequence --scruffy "[Patron]order food>[Waiter],[Waiter]order food>[Cook],[Waiter]serve wine>[Patron],[Cook]pickup>[Waiter],[Waiter]serve food>[Patron],[Patron]pay>[Cashier]" > test.png

Now same test without scruffy option:

suml -i test.suml --png --sequence "[Patron]order food>[Waiter],[Waiter]order food>[Cook],[Waiter]serve wine>[Patron],[Cook]pickup>[Waiter],[Waiter]serve food>[Patron],[Patron]pay>[Cashier]" > test.png

Is it a known issue ?

Thanks.